In this Sunday, Nov. 30, 2014 photo provided by the U.S. Coast Guard, the Coast Guard Cutter Polar Star, a 399-foot polar class icebreaker, is escorted away from the pier at its home port of Coast Guard Base Seattle by the tugboat Westrac, for deployment to Antarctica. The crew of Polar Star will be supporting the U.S. Antarctic Program and the National Science Foundation during their four-month mission. (AP Photo/U.S. Coast Guard, Petty Officer 3rd Class Katelyn Shearer)
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